diff --git a/WORKSPACE b/WORKSPACE
index 7c463a2c..33fc663d 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -16,8 +16,8 @@ http_archive(
     url = "https://github.com/proxy-wasm/proxy-wasm-cpp-host/archive/" + PROXY_WASM_HOST_COMMIT + ".tar.gz",
 )
 
-PROXY_WASM_CPP_COMMIT = "921039ae983ce053bf5cba78a85a3c08ff9791e5"  # 2023-05-01
-PROXY_WASM_CPP_SHA256 = "a11adfe4e6346d3318ff72643aa5569dc8439d7e8927ed148f93226fa255cc7a"
+PROXY_WASM_CPP_COMMIT = "6efffe99a90d764b063b9fa8213d2c34ae69a7da"  # PR#157
+PROXY_WASM_CPP_SHA256 = "db00ef59d8024d0db74a269ece76d8106c1e9afc1abed237aea8366a8db2983e"
 
 http_archive(
     name = "proxy_wasm_cpp_sdk",
diff --git a/samples/config_denylist/BUILD b/samples/config_denylist/BUILD
index 00eed6f6..ec8bb789 100644
--- a/samples/config_denylist/BUILD
+++ b/samples/config_denylist/BUILD
@@ -16,6 +16,7 @@ proxy_wasm_plugin_cpp(
     srcs = ["plugin.cc"],
     deps = [
         "@proxy_wasm_cpp_sdk//contrib:contrib_lib",
+        "@com_google_absl//absl/strings:strings",
     ],
 )
 
diff --git a/samples/config_denylist/plugin.cc b/samples/config_denylist/plugin.cc
index 3619fc3b..4dd1ec76 100644
--- a/samples/config_denylist/plugin.cc
+++ b/samples/config_denylist/plugin.cc
@@ -15,6 +15,7 @@
 #include <unordered_set>
 
 #include "proxy_wasm_intrinsics.h"
+#include "absl/strings/str_cat.h"
 
 class MyRootContext : public RootContext {
  public:
@@ -39,7 +40,7 @@ class MyRootContext : public RootContext {
       }
       idx = nxt + 1;
     }
-    LOG_INFO("Config keys size " + std::to_string(tokens_.size()));
+    LOG_INFO(absl::StrCat("Config keys size ", tokens_.size()));
     return true;
   }
 
diff --git a/samples/regex_rewrite/BUILD b/samples/regex_rewrite/BUILD
index 222338aa..383dd0a2 100644
--- a/samples/regex_rewrite/BUILD
+++ b/samples/regex_rewrite/BUILD
@@ -12,23 +12,20 @@ proxy_wasm_plugin_rust(
     ],
 )
 
-# Blocked on emscripten update to fix Abseil/RE2 compatibility:
-# https://github.com/proxy-wasm/proxy-wasm-cpp-sdk/pull/157
-# NOTE: Plugins can be built using that PR -- it's blocked on Envoy.
-#proxy_wasm_plugin_cpp(
-#    name = "plugin_cpp.wasm",
-#    srcs = ["plugin.cc"],
-#    deps = [
-#        "@com_google_re2//:re2",
-#        "@proxy_wasm_cpp_sdk//contrib:contrib_lib",
-#    ],
-#)
+proxy_wasm_plugin_cpp(
+    name = "plugin_cpp.wasm",
+    srcs = ["plugin.cc"],
+    deps = [
+        "@com_google_re2//:re2",
+        "@proxy_wasm_cpp_sdk//contrib:contrib_lib",
+    ],
+)
 
 cc_test(
     name = "plugin_test",
     srcs = ["test.cc"],
     data = [
-        #":plugin_cpp.wasm",
+        ":plugin_cpp.wasm",
         ":plugin_rust.wasm",
     ],
     deps = [
diff --git a/samples/regex_rewrite/test.cc b/samples/regex_rewrite/test.cc
index 86e18c4d..0b4bd1c4 100644
--- a/samples/regex_rewrite/test.cc
+++ b/samples/regex_rewrite/test.cc
@@ -25,10 +25,10 @@ namespace service_extensions_samples {
 
 INSTANTIATE_TEST_SUITE_P(
     EnginesAndPlugins, HttpTest,
-    ::testing::Combine(::testing::ValuesIn(proxy_wasm::getWasmEngines()),
-                       ::testing::Values(
-                           //"samples/regex_rewrite/plugin_cpp.wasm",
-                           "samples/regex_rewrite/plugin_rust.wasm")));
+    ::testing::Combine(
+        ::testing::ValuesIn(proxy_wasm::getWasmEngines()),
+        ::testing::Values("samples/regex_rewrite/plugin_cpp.wasm",
+                          "samples/regex_rewrite/plugin_rust.wasm")));
 
 TEST_P(HttpTest, NoMatch) {
   // Create VM and load the plugin.